How to say "defective" in Japanese
Choosing the right word
- 不良ふりょうno-adjective, na-adjectiveCovers defective in the sense of faulty or substandard: a thing whose quality falls short, so it fails to work properly. Think of manufactured goods that turn out bad or inferior.
- 不完全ふかんぜんna-adjective, nounCovers defective in the sense of imperfect or incomplete: something faulty because it lacks parts or is not whole, rather than because its quality is poor. Typical of data or a system missing elements.
Use 不良 for defective in the sense of faulty or substandard, especially goods that fail to work properly, and 不完全 for defective in the sense of incomplete or imperfect, missing parts or not fully formed.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese equivalents
This browser can't play pronunciations (needs Safari 18.4 or later, or Chrome / Edge / Firefox).
